20 (火)	06:29	00:17	-	15:15
	115cm	94cm	-	30cm
小潮 出 04:29 入 18:07 出 09:47 入 00:48 潮干狩り ○ 13:59～16:31

根室（北海道）2021年04月20日の10分毎の潮の高低差を確認できます。
また1日の潮の高低差が1番大きい（潮の流れが大きい）時間に「最大潮位差」と明記してます。

時刻	潮位	高低差	各ポイント
4/20 00:00	93.7	0
4/20 00:10	93.6	↓-0.1	干潮
4/20 00:20	93.6	0
4/20 00:30	93.7	↑0.1
4/20 00:40	93.7	0
4/20 00:50	93.9	↑0.2
4/20 01:00	94.0	↑0.1
4/20 01:10	94.2	↑0.2
4/20 01:20	94.5	↑0.3
4/20 01:30	94.8	↑0.3
4/20 01:40	95.2	↑0.4
4/20 01:50	95.7	↑0.5
4/20 02:00	96.2	↑0.5
4/20 02:10	96.7	↑0.5
4/20 02:20	97.3	↑0.6
4/20 02:30	98.0	↑0.7
4/20 02:40	98.7	↑0.7
4/20 02:50	99.5	↑0.8
4/20 03:00	100.3	↑0.8
4/20 03:10	101.1	↑0.8
4/20 03:20	101.9	↑0.8
4/20 03:30	102.8	↑0.9
4/20 03:40	103.7	↑0.9
4/20 03:50	104.6	↑0.9
4/20 04:00	105.6	↑1.0
4/20 04:10	106.5	↑0.9
4/20 04:20	107.4	↑0.9
4/20 04:30	108.2	↑0.8
4/20 04:40	109.1	↑0.9
4/20 04:50	109.9	↑0.8
4/20 05:00	110.7	↑0.8
4/20 05:10	111.4	↑0.7
4/20 05:20	112.0	↑0.6
4/20 05:30	112.6	↑0.6
4/20 05:40	113.1	↑0.5
4/20 05:50	113.6	↑0.5
4/20 06:00	113.9	↑0.3
4/20 06:10	114.2	↑0.3
4/20 06:20	114.3	↑0.1	満潮
4/20 06:30	114.3	0
4/20 06:40	114.2	↓-0.1
4/20 06:50	114.0	↓-0.2
4/20 07:00	113.7	↓-0.3
4/20 07:10	113.3	↓-0.4
4/20 07:20	112.7	↓-0.6
4/20 07:30	112.0	↓-0.7
4/20 07:40	111.1	↓-0.9
4/20 07:50	110.2	↓-0.9
4/20 08:00	109.1	↓-1.1
4/20 08:10	107.8	↓-1.3
4/20 08:20	106.5	↓-1.3
4/20 08:30	105.0	↓-1.5
4/20 08:40	103.4	↓-1.6
4/20 08:50	101.6	↓-1.8
4/20 09:00	99.8	↓-1.8
4/20 09:10	97.9	↓-1.9
4/20 09:20	95.8	↓-2.1
4/20 09:30	93.7	↓-2.1
4/20 09:40	91.4	↓-2.3
4/20 09:50	89.1	↓-2.3
4/20 10:00	86.7	↓-2.4
4/20 10:10	84.3	↓-2.4
4/20 10:20	81.8	↓-2.5
4/20 10:30	79.2	↓-2.6
4/20 10:40	76.6	↓-2.6
4/20 10:50	74.0	↓-2.6
4/20 11:00	71.4	↓-2.6
4/20 11:10	68.8	↓-2.6
4/20 11:20	66.1	↓-2.7	最大潮位差
4/20 11:30	63.5	↓-2.6
4/20 11:40	61.0	↓-2.5
4/20 11:50	58.4	↓-2.6
4/20 12:00	55.9	↓-2.5
4/20 12:10	53.5	↓-2.4
4/20 12:20	51.2	↓-2.3
4/20 12:30	48.9	↓-2.3
4/20 12:40	46.7	↓-2.2
4/20 12:50	44.6	↓-2.1
4/20 13:00	42.6	↓-2.0
4/20 13:10	40.7	↓-1.9
4/20 13:20	39.0	↓-1.7
4/20 13:30	37.3	↓-1.7
4/20 13:40	35.8	↓-1.5
4/20 13:50	34.5	↓-1.3
4/20 14:00	33.3	↓-1.2
4/20 14:10	32.2	↓-1.1
4/20 14:20	31.3	↓-0.9
4/20 14:30	30.5	↓-0.8
4/20 14:40	29.9	↓-0.6
4/20 14:50	29.5	↓-0.4
4/20 15:00	29.2	↓-0.3
4/20 15:10	29.1	↓-0.1	干潮
4/20 15:20	29.1	0
4/20 15:30	29.3	↑0.2
4/20 15:40	29.6	↑0.3
4/20 15:50	30.1	↑0.5
4/20 16:00	30.7	↑0.6
4/20 16:10	31.5	↑0.8
4/20 16:20	32.4	↑0.9
4/20 16:30	33.4	↑1.0
4/20 16:40	34.5	↑1.1
4/20 16:50	35.8	↑1.3
4/20 17:00	37.2	↑1.4
4/20 17:10	38.7	↑1.5
4/20 17:20	40.3	↑1.6
4/20 17:30	42.0	↑1.7
4/20 17:40	43.7	↑1.7
4/20 17:50	45.5	↑1.8
4/20 18:00	47.4	↑1.9
4/20 18:10	49.4	↑2.0
4/20 18:20	51.4	↑2.0
4/20 18:30	53.4	↑2.0
4/20 18:40	55.4	↑2.0
4/20 18:50	57.5	↑2.1
4/20 19:00	59.6	↑2.1
4/20 19:10	61.7	↑2.1
4/20 19:20	63.8	↑2.1
4/20 19:30	65.8	↑2.0
4/20 19:40	67.9	↑2.1
4/20 19:50	69.9	↑2.0
4/20 20:00	71.8	↑1.9
4/20 20:10	73.8	↑2.0
4/20 20:20	75.7	↑1.9
4/20 20:30	77.5	↑1.8
4/20 20:40	79.2	↑1.7
4/20 20:50	80.9	↑1.7
4/20 21:00	82.6	↑1.7
4/20 21:10	84.1	↑1.5
4/20 21:20	85.6	↑1.5
4/20 21:30	87.0	↑1.4
4/20 21:40	88.4	↑1.4
4/20 21:50	89.6	↑1.2
4/20 22:00	90.8	↑1.2
4/20 22:10	91.8	↑1.0
4/20 22:20	92.8	↑1.0
4/20 22:30	93.7	↑0.9
4/20 22:40	94.6	↑0.9
4/20 22:50	95.3	↑0.7
4/20 23:00	96.0	↑0.7
4/20 23:10	96.6	↑0.6
4/20 23:20	97.1	↑0.5
4/20 23:30	97.6	↑0.5
4/20 23:40	98.0	↑0.4
4/20 23:50	98.3	↑0.3